Secondly, a multi-objective optimization model was constructed, and the NSGA-II was used to solve the model. Finally, an example of gold ore flotation was used to verify the effectiveness of the method. The optimal solution was a gold concentrate grade of 75.46 g/t and a gold recovery rate of 85.98%.
One flotation concentrate displayed a higher nominal gold grade of 28 g/t and further produced bio-oxidised product with 38 g/t gold grades. The other flotation concentrate had much lesser gold grade (17 g/t) and, hence, produced a bio-oxidised product of 23 g/t gold grade.
Concentrate Grade (g/t) Flotation Recovery (%) Calculated Feed Grade (g/t) KMMC-1 89.0 98.6 87.9 4.23 KMMC-2 95.0 312.0 82.2 20.3 KMMC-3 93.2 152.0 89.6 8.42 KMMC-4 93.8 199.0 76.0 11.4 1 Overall recovery is the total of the gold recovered into flotation concentrate plus gold …
Feb 07, 2020 Understanding Gold Grading. All precious metals are graded by the proportion of metal in the ore. Grams per tonne of milled ore, or g/t, is the most common metric used to represent the grade of ...
Jul 19, 2021 92.5-95.1% recovery into high-grade gold concentrate utilising the same processing route employed by the Blackdome Gold Mine plant (ie, crushing, grinding, gravity separation and flotation)
• gold grade is typically high but variable: 5 g/t Au to 50 g/t Au; • copper grade ranges between 0.2% Cu and 1.5% Cu. Stockwork mineralization is characterized by narrow, often discontinuous veins that crosscut stratigraphy.
Aug 09, 2021 The lead and zinc concentrates were then submitted to open circuit cleaner tests. These tests produced lead-silver-gold and zinc-silver cleaner flotation concentrates: The lead-silver-gold cleaner concentrate graded 39,744 g/t Ag, 56.8% lead, 14.6 g/t Au, 3.11% Zn that recovered 64.1% of the silver, 56.6% of the gold and 62.8% of the lead.
high at 300 kg/t. Case Study 2 – Copper Flotation Concentrate Four hundred kilograms of this concentrate, grading 70 g/t gold and 30% copper, was leached in the ILR100. Figure 6 shows the gold and copper leach kinetics and in this case, gold leaching (94%) was a lot faster than copper leaching (45%) due to the presence of some slow
Aug 09, 2021 These tests produced lead-silver-gold and zinc-silver cleaner flotation concentrates: The lead-silver-gold cleaner concentrate graded 39,744 g/t Ag, 56.8% lead, 14.6 g/t Au, 3.11% Zn that ...
Mar 28, 2008 In a tailing sample, where gold was liberated, concentrate recoveries were of the order of 15% Au, with grades higher than 160 g t − 1 Au and enrichment ratio of the order of 120. With low gold grades (0.15–0.4 g t − 1 Au) and a poor liberation, this 3pc cell was able to produce a product (12% gold recovery) with the quality of a rougher flotation concentrate (13 g t − 1 Au).
High-grade concentrates assaying 30-50ppm of gold was obtained by flotation column whereas conventional cells have yielded barely 5-10ppm of gold concentrates. The recoveries were found to be more or less same in both the cases. Also, it is apparent that around 40% of the solids report to concentrate
The concentrate product rate was estimated to be 0.4 t/h (9.6 t/d), and the gold grade was 105.5 g/t for this closed flotation circuit at a throughput of 7.08 t/h (= 170 t/d). The total recovery of the circuit was 94.92%, and the enrichment ratio was 16.3 (= 105.5/6.47).
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